Attachment for band-saws.



PATENTED DEC. 24, 1907.

A. M. PORTTEUS. ATTACHMENT FOR BAND SAWS.

APPDICATION FILED MAY 27. 1907.

35 leaf '.rlllll UNITED srArEs PATENT oFFIoE.

ALBERT M. PORTTEUS, OF INDIANAPOLIS, INDIANA, ASSIGNOR OFP ONE-HALF TOPHILIP G.

BASSO, OF INDIANAPOLIS, INDIANA.

ATTACHIKENT FOR BAND-SAWS.

Patented Dec. 24, 1907.

Application filed May 27. 1907. Serial No. 375,953,

To all lwhom` 'it may concern.'

Be it known that I, ALBERT M. PoR'r'rEUs,`

a citizen of the United States, residing at Indianapolis, in the countyof Marion and State of Indiana, have invented certain new and usefulImprovements in Attachments for Band-Saws, of which the following is aspecification. 7

The object of my present inventionis to provide an attachment for thetables of band saws by means of which irregular parts, such as chairrockers` and the like, .may be rapidly and accurately produced. Y

Said invention will be first fully described land the novelfeaturesthereof then pointed .out in the claims.

Referring to the accompanying drawings, which are made a part hereof,and on which similar reference characters indicate similar parts, Figure1 is a perspective view of a band saw provided with a table andattachments embodying my present invention;

Fig. 2 a top or plan view of the bed plate or stationary portion oftable of my improved device'; Fig. 3 a similar view of the carriageormovable part of the device; Fig. 4 a transverse sectional viewv throuh the arts when assembled, at the point in icated liy the dotted lines 44 in Figs. 2 andl 3; and Fig. 5 a descale.

` The frame 21, wheels 22 and 23,'saw 24, and various attachments, areor may be of any usual or desired form or construction; and, not being apart of my resent invention, will not be further d'escri ed herein,except incidentally in describing said invention.

The bed plate 31`is rigidly attached to the member 211 of the frame 21ofthe saw. While rigidly'attachedit is designed to be removable. Aslit-32 is formed. therein to enable it to pass over the saw in beingretail view similar to Fig. 4, but on an enlarged movedand replaced, andalso to enable thel saw to be removed and` replaced as occasion vmayrequire. Its lfront end is also cut away, as shown, to enable theoperator to ap roach it more closely than he otherwise cou d. It carriesupon lts upppr side curved guides or ways 35 and 36, Wit which suitableparts on the carriage will engage (as will be presently more fullydescribed) whereby the carrialg'e is given the roper movement to producet e desired resu t. Stops 37 and 38 limit the travel of the carriage.

`slit 47 should be hel -The carriage 41 is mounted upon and travelsoverthe bed plate 31 being provided with pins or projections 42 and 43, orequivalent parts, which engage with and are guided' by the guides orways 35 and 36 on said bed plate. Projections 44, 45 and 46 areprovided, with which the stock is designed to be in contact while beingsawed. A curved slit' 47 runs through this carriage for the greaterportion of its length, through which the saw passes during "the sawingoperation. A notch 48 in this carriage comes in contact with the stop-38on the bed plate when the carriage is drawn back, to its greatest extentvrlhe other end contacts with the stop 37 when the carriage has beenpushed forward The form of guides or ways shown are those appropriate tothe sawing of chair rockers. In sawing such rockers the operationV maybe stated as-follows: The bed plate and carriage having been properlyassembled and positioned with relation to the saw,a piece of suitablestock is laid on the carriage with its side properly positionedrelatively to the slit 47.and the end nearest the operator restingagainst the stop 46. `The operator then pushes the carriage forward andthe appropriate form is produced. The piece sawed 0H is then ta en away,the stock pushed over against the sto s 44 and 45, and a second cutproduces a roc er of the desired shape. This operation is continueduntil the piece of stock is entirely consumed.

It will be noticed that 'the pins or projections 42 and 43 arenot onlyon opposite sides in order to permit of the 'required movementsnecessary to produce the irregular sha e desired. 4

he carriage 41, as well as the bed plate 31, needs to be occasionallyremoved and replaced, or the saw inserted and removed. It 1s, however,necessary that the parts of the carriage bed on the op osite sides ofthe sawrigidly relatively to each other. I have, therefore, provided across-bar 51, which is bolted or otherwise pro erly secured to the endof the carriage, an Which extends across said saw-slit. In

'to its greatest extent. l The carriage isusu- ,ally operated by ahandle 49.

order, however, to enable the carriage and saw to be convenientlydisassociated, that portion of this bar which crosses the saw-slit mustbe turned, or moved out of the way, from time to time. .I have,therefore, made said bar in two parts, and have connected these parts bya hinge 52, and the shorter part is secured to the narrower part of thecarriage bed by a single bolt 53. By removing said bolt this hinged partcan be turned back, when the carriage and saw can be easily separated.

Having thus fully described my said invention, what I claim as new, anddesire to secure by Letters Patent, is

1. The combination of a saw table provided with curved ways, and acarriage hav- .ing projections which extend into and engage with saidways, and also provided with suitable stopsagainst which the stock willrest while being sawed, and a curved slit through which the saw willpass correspondirlig to the shape of the desired finished artic e.

2. The combination of a saw table having irregular guides or ways, acarriage mounted thereon and having projections which eny gagewith saidways, said projections being Ipositioned toward opposite sides of saidcarriage and also toward opposite ends thereof. 3. The combination witha saw table having guides or ways thereon, of a carriage engaging withone of said ways near one end and with the other of'said ways near theother end, the movements of the opposite ends of said carriage beingthus guided by said two separate ways.

,-4. The combination of a saw table or bed plate having irregular guidesor ways, of a carriage mounted thereon and having separate engagingpoints with said guides or ALBERT M. PORTTEUS.

Witnesses:

CHESTER BRADFORD, THOMAS W. MCMEANS.

